Re: [boost] Inconsistency between std::minmax and boost::minmax

Subject: Re: [boost] Inconsistency between std::minmax and boost::minmax
From: Marshall Clow (mclow.lists_at_[hidden])
Date: 2012-02-24 19:58:41

On Feb 24, 2012, at 2:00 PM, Jeffrey Lee Hellrung, Jr. wrote:

> On Fri, Feb 24, 2012 at 1:52 PM, Marshall Clow <mclow.lists_at_[hidden]>wrote:
> 
>> So, C++11 has been approved, and in the new standard library, there is:
>> 
>>       template <typename T>
>>       std::pair<const T&, const T&>
>>       minmax ( const T& a, const T& b )
>> 
>> but in Boost, we've got:
>>       template <typename T>
>>       tuple< T const&, T const& >
>>       minmax(T const& a, T const& b) {
>> 
>> I can easily change boost minmax to return a pair instead of a 2-element
>> tuple, but that's an interface change, and might break existing code.
>> 
>> On the other hand, giving them the same interface will make it easier for
>> people to move to C++11's library functions.
>> 
>> Any opinions? ideas?
>> 
> 
> I could be wrong about this, but wouldn't that be problematic for C++03
> std::pair, which (typically) barfs when instantiated with reference types?

Unfortunately, all I can find is
> 	late after the review, as I finally scrounged to add the library for a release, Eric Niebler noted the bad behavior of std::pair for minmax and suggested to use Boost.tuple instead. 

Does anyone have a link to  this discussion?

-- Marshall

Marshall Clow     Idio Software   <mailto:mclow.lists_at_[hidden]>

A.D. 1517: Martin Luther nails his 95 Theses to the church door and is promptly moderated down to (-1, Flamebait).
        -- Yu Suzuki